In the tree-filled city of Kazematsuri, Kotarou spends peaceful days with Kotori, Haruhiko and their friends. Every year, there is a time when the city becomes very noisy: the harvest festival. He decides to help out with collecting news about the upcoming event and accidentally stumbles upon some unexplainable happenings. Spurred on by his curiosity, he begins to investigate it with help from the occult club leader Akane and other students they knew. However, they did not yet know that it was related to a search for the truth that no one knew about. Will her fate be able to be rewritten? – Hau~ Omochikaeri~!